介绍轮毂轴承密封结构与主要结构参数,以第3代轮毂轴承单元密封结构为例,讨论了密封失效诊断、磨痕分析、残余过盈量获取与磨耗重构方法,并总结了密封失效的8类原因,为轮毂轴承的密封设计与失效分析提供了参考.%The seal structural and main parameters of hub bearing are introduced.Taking the seal structure of third gen-eration hub bearing unit as an example,the methods are discussed for seal failure diagnosis,grinding crack analysis,re-sidual interference acquisition and abrasion reconsitution.The eight reasons are summarized for seal failure,which pro-vide a reference for seal design and failure analysis of hub bearing.
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